DTC U0131: Gauge Control Module Lost Communication With EPS Control Unit (EPS Message)

NOTE:

If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
If the HDS does not communicate with the EPS control unit, the EPS indicator stays on, and no EPS DTCs are stored, go to symptom troubleshooting for EPS indicator does not go off, and no DTCs are stored (see EPS INDICATOR DOES NOT GO OFF, AND NO DTCS ARE STORED ).

Clear the DTCs with the HDS.
Turn the ignition switch to LOCK (0) and then back to ON (II), or press the engine start/stop button to select the OFF mode and then the ON mode.
Wait for at least 6 seconds.
Check for DTCs with the HDS.
Is DTC U0131 indicated?

YES -Go to step 5.

NO -Intermittent failure, the system is OK at this time. Check for loose or poor connections between the gauge control module and the EPS control unit.
Check for EPS DTCs with the HDS.
Are any DTCs indicated?

YES -Go to the EPS indicated DTCS TROUBLESHOOTING , then recheck.

NO -Go to step 6.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
Disconnect the gauge control module 32P connector.
Disconnect EPS control unit connector D (28P).
Check for continuity between the gauge control module 32P connector terminals No. 13 and No. 14 and EPS control unit connector D (28P) terminals No. 15 and No. 1 respectively.

Fig 1: Checking Continuity Between Gauge Control Module 32P Connector And EPS Control Unit Connector D (28P)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Substitute a known-good EPS control unit (see RACK GUIDE REMOVAL/INSTALLATION ), and recheck. If the indication goes away, replace the original EPS control unit. If the DTC is still present, replace the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).

NO -Repair an open or poor connection in the wire between the EPS control unit and the gauge control module.